Selected natural stones have no holes, no buckles, and irregularities.High quality smooth, tumbling crystal stones in bulk, wholesale stones.The crystal gravel is the best decorative soil substitute and fish tank decoration.These small gravels are suitable for home interior decoration, scene setting, fish tanks, flower pots, air plants, plant bedding, feng shui energy enhancement and other craft projects.They have some profound meanings.For example,green fluorite represents calmness and vitality.Yellow Tiger's Eye: prevent depression, give courage and calmness.Amethyst: stand for elegance, good for your social life.Obsidian: good luck; help you have a nice sleep.